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Ubuntu 23.04 : Linux kernel vulnerabilities (USN-6250-1)

high Nessus Plugin ID 178797

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 23.04 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6250-1 advisory.

 - On Ubuntu kernels carrying both c914c0e27eb0 and UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs, an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks. (CVE-2023-2640)

 - A heap out-of-bounds write vulnerability in the Linux Kernel ipvlan network driver can be exploited to achieve local privilege escalation. The out-of-bounds write is caused by missing skb->cb initialization in the ipvlan network driver. The vulnerability is reachable if CONFIG_IPVLAN is enabled. We recommend upgrading past commit 90cbed5247439a966b645b34eb0a2e037836ea8e. (CVE-2023-3090)

 - Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace (CVE-2023-31248)

 - Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels (CVE-2023-32629)

 - A vulnerability exists in the memory management subsystem of the Linux kernel. The lock handling for accessing and updating virtual memory areas (VMAs) is incorrect, leading to use-after-free problems. This issue can be successfully exploited to execute arbitrary kernel code, escalate containers, and gain root privileges. (CVE-2023-3269)

 - A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable). (CVE-2023-3389)

 - A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in net/netfilter/nf_tables_api.c. Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same transaction causing a use-after-free vulnerability. This flaw allows a local attacker with user access to cause a privilege escalation issue. We recommend upgrading past commit 1240eb93f0616b21c675416516ff3d74798fdc97. (CVE-2023-3390)

 - Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace (CVE-2023-35001)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-6250-1

Plugin Details

Severity: High

ID: 178797

File Name: ubuntu_USN-6250-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/26/2023

Updated: 1/9/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2023-35001

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1006-ibm, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1010-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1009-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1009-lowlatency, cpe:/o:canonical:ubuntu_linux:23.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-26-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1008-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1008-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-26-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1009-lowlatency-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-26-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-6.2.0-1008-oracle

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/25/2023

Vulnerability Publication Date: 6/21/2023

Exploitable With

Core Impact

Reference Information

CVE: CVE-2023-2640, CVE-2023-3090, CVE-2023-31248, CVE-2023-32629, CVE-2023-3269, CVE-2023-3389, CVE-2023-3390, CVE-2023-35001

USN: 6250-1